Engineering Design Considerations of a 2MW 20kV/750V ISOP Triple-Voltage Three-Phase DAB based DC Transformer Converter

The triple-voltage three-phase dual-active bridge (T
²
DAB) Converter offers low voltage stress, high power density and high efficiency advantages, which is regarded as an emerging part of high-gain DC transformer. This paper describes the engineering design considerations of 2MW 20kV/750V T
²
DAB converter for flexible interconnection distribution networks, which consists of power module design, parameter design and power loss analysis. The 2MW 20kV/750V T
²
DAB converter prototype is built and tested, the results indicate that the proposed design consideration and can perfectly satisfy the design requirements.